Objective To evaluate the effects of dexmedetomidine on the expression of neuronal nitric oxide synthase (nNOS) and c-fos in the lcuos cruleus (LC) in a rat model of endotoxic shock.Methods Twentyeight male Sprague-Dawley rats,aged 8 weeks,weighing 250-300 g,were randomly divided into 4 groups (n =7 each):control group (group C),endotoxic shock induced by lipopolysaccharide (LPS) group (group L),lowdose dexmedetomidine group (groupLD) and high-dose dexmedetomidine group (group HD).Normal saline 0.5 ml/kg was injected via the tail vein in C and L groups.Dexmedetomidine 0.5 and 4.5μg/kg were injected via the tail vein in group LD and group HD,respectively.Normal saline 0.5 ml/kg was injected via the tail vein 10 min later in C,while LPS 5 mg/kg was injected intravenously 10 min later in the other groups.The rats were sacrificed and their brains were removed for determination of brain water content,the number of nNOS and c-fos positive cells and expression of nNOS and c-fos in the LC by immuno-histochemistry.Results Compared with group C,the brain water content was significantly increased,the number of nNOS and c-fos positive cells in the LC was enlarged,and the expression of nNOS and c-fos in the LC was up-regulated in group L (P ＜ 0.05).The brain water content was significantly lower,the number of nNOS and c-fos positive cells in the LC was smaller,and the expression of nNOS and c-fos in the LC was lower in LD and HD groups than in group L (P ＜ 0.05).The number of nNOS and c-fos positive cells in the LC was significantly smaller,and the expression of nNOS and c-fos in the LC was lower in HD group than in group LD (P ＜ 0.05).Conclusion Dexmedetomidine can down-regulate the expression of nNOS and c-fos in the LC,which may be one of brain-protective mechanisms of dexmedetomidine in a rat model of endotoxic shock.

Objective: To observe the changes of Bcl-xl expression in hippocampus of the rats with the forced-swimming and the changes of Bcl-xl after poststress. Methods: The protocol was established with the forced-swimming as the chronic stress model. Open-field test was executed to measure the behaviors of the rats. Immunohistochemistry was used to observe the changes of Bcl-xl expression in the hippocampus. Results: Compared to the control group,the expression of Bcl-xl in CA3 region of the hippocampus and dendate gyrus(DG)of the rats was decreased morphologically. With the computerized image analysis, the gray degree increased significantly (P

Objective To analyze the epidemiological characteristics of human brucellosis in Harbin City.Methods Retrospective study was used to collect the information of brucellosis epidemic situation and monitoring data.The information of brucellosis cases was from China disease surveillance information system and from the Harbin surveillance results of brucellosis between 2004 and 2013.According to the results of epidemiological characteristics of brucellosis in Harbin,analysis of regional distribution,time distribution,population distribution and brucellosis serology positive rate were conducted in 18 counties (cities,districts) of Harbin.Data were analyzed using SPSS 13.0 software.Results From 2004 to 2013,2 602 cases of brucellosis were reported.In particular,the largest increase was in 2012,a total of 481 cases was reported,which was 2.11 times that of 2011 (228 cases).The incidence was raised from 2.20/100 000 to 5.98/100 000,and the epidemic range expanded from 15 counties (cities,districts) to 18 counties (cities,districts).Age of onset concentrated in young adults,the 20-59 years old group accounting for 86.47％ (2 250/2 602) of the total incidence.The proportion of male and female was 2.90 ∶ 1.00 (1 936 ∶ 666).The occupation of most new cases was farmers,accounting for 83.55％ (2 174/2 602) of the total incidence.In brucellosis surveillance,4 877 people was undergo serological test,the positive number was 145,and the positive rate was 2.97％.Conclusion Human brucellosis epidemic has an increasing trend in Harbin,age of onset is concentrated in young adults,males are more than females,and the epidemic range expands year by year.

To discuss the protective effect of aralosides (AS) on I/R-induced rat myocardial injury. The adult rat ventricular myocyte ischemia model was established through perfusion with sodium lactate perfusate and reperfusion with Ca(2+) -containing Tyrode's solution simulation. The cell contraction and ion concentration synchronization determination system was applied to detect the effect of AS on single I/R cell contraction and Ca2+ transients. According to the findings, AS could increase resting sarcomere length, contraction amplitude, ± dL/dt(max), calcium transient amplitude and speed of post-reperfusion myocardial cells (P < 0.05, P < 0.01), and decrease in time for achieving 90.0% of maximum relaxation, time for achieving peak value, resting calcium ratio, contraction period [Ca2+] i, time for achieving 50.0% of maximum relaxation and attenuation rate of intracellular calcium transient (P < 0.05, P < 0.01). Therefore, it is suggested that AS improved the post-reperfusion cell contraction and injury of calcium homeostasis.
Animals ; Aralia ; chemistry ; Biological Transport ; drug effects ; Calcium ; metabolism ; Drugs, Chinese Herbal ; administration & dosage ; Humans ; Male ; Muscle Contraction ; drug effects ; Myocardial Ischemia ; drug therapy ; metabolism ; physiopathology ; surgery ; Myocardial Reperfusion ; Myocytes, Cardiac ; drug effects ; physiology ; Rats ; Rats, Sprague-Dawley ; Saponins ; administration & dosage

Scientific and technological ability is one of the core competitiveness of the hospital.The hospital medical researchers are the main body of technological innovation activities.The establishment of scientific and effective incentive mechanism is an important way to stimulate the potential innovation of researchers and to promote the development of the hospital.In this article,we summarized the common problems on current research incentive mechanism in hospitals and proposed the corresponding strategies,in order to improve the research incentive mechanism.

ObjectiveTo explore the resilience and mental health of recruits during training,and to investigate mutual prediction of resilience between mental health and psychological stress to provide the scientific evidence for the mental health training and psychological selection of recruits.MethodsConnor-Davidson resilience questionnaire ( CD-RISC),symptom checklist ( SCL-90 ),psychological stress self-evaluation test ( PSET),satisfaction with life scale (SWLS),positive and negative affect scale (PANAS) were applied to 650 recruits in 2011 before starting training and after two months of training.Results ① Chinese recruits had good resilience,and the CD scores of pre-and post-test were (61.60 ± 14.36) and (61.41 ± 14.55 ) respectively.②Mental health (SCL-90) of two tests were good in recruits.③ Correlation analysis showed that the same premise of phase correlation,resilience (pre-test) could significantly predict mental health (post-test) ( β =0.070,P ＜ 0.05 ),mental health ( pretest) could not predict resilience (post-test) (β =0.015,P ＞ 0.05 ).Resilience (pre-test) could significantly predict psychological stress (post-test) ( β =0.075,P ＜ 0.05 ),psychological stress (pre-test) could not predict resilience (post-test) (β =0.017,P ＞ 0.05 ).④ Compared with high resilience group,low-resilience group of recruits had higher total score of SCL-90 and psychological stress and less positive emotion,more negative emotion and lower life satisfaction.ConclusionThe recruits training have good resilience.Resilience of recruits have predictive ability to mental health,psychological stress during training.

Objective To investigate the clinical efficacy of hydrocortisone sodium succinate for treatment of septic shock patients and their prognoses. Methods A prospective case control study was conducted. 49 patients with septic shock in the Department of Emergency of the First Affiliated Hospital of Xi'an Jiaotong University were enrolled from January 2010 to January 2012,and the patients were sequentially divided into two groups,the treatment group(24 cases)and the control group(25 cases),by the difference in odd or even number. All patients in the two groups accepted the conventional treatment. The treatment group additionally received hydrocortisone sodium succinate injection 200 mg,once a day for 5 days. The levels of serum procalcitonin(PCT),C-reactive protein(CRP)were measured in all the patients before treatment and 24 hours,72 hours and 7 days after treatment. The mortalities were compared in 14 days between the two groups. Results The levels of PCT,CRP before and 24 hours after treatment were not statistically significant different from those of pre-treatment in two groups(all P>0.05). PCT and CRP were decreased at 72 hours and 7 days after treatment in the two groups,and on the 7th day the decline was more significant, and compared with the control group,the levels of PCT and CRP in treatment group were reduced more markedly at 72 hours and on the 7th day〔PCT(μg/L):72 hours 9.73±2.10 vs. 12.36±2.56,7 days 5.33±2.05 vs. 8.76±1.78;CRP(μg/L):72 hours 69.12±13.61 vs. 109.68±16.16,7 days 20.16±9.64 vs. 42.32±13.16,all P<0.05〕. But the mortality in 14 days was not statistically significant different between control group and treatment group(52.0%vs. 45.8%,P>0.05). Conclusion The treatment with hydrocortisone sodium succinate can reduce the inflammation of patients with septic shock,thus it has clinical value in the improvement of the disease situation.

BACKGROUND: Nano-hydroxyapatite (Nano-HA) has been shown to be a good choice of bone repair material owing to its salts composition consistent with natural bone and its scaffold structure homothetic to natural bone structure. OBJECTIVE: To investigate the feasibility of nano-HA in repair of jaw bone defect in rabbits. DESIGN, TIME AND SETTING: Materials-based animal experimental observation was performed at Laboratory Animal Center of Jiamusi University and Beijing Ji Shui Tan Hospital between January 2003 and June 2005. MATERIALS: Neutralization reaction of calcium biphosphate and calcium hydroxide was used to construct the system. The reactants were managed to be cotloidal by reaction control and using appropriate nucleating agents. Acerata HA crystal obtained under different conditions was sintered to obtain the nano-HA granule with a diameter of 1-56 nm. METHODS: Twenty-four healthy Chinese Harbin rabbits were randomly and evenly divided into an experimental group and a control group. After anesthesia, a penetrating 1.5 cm x1.5 cm defect was made with the GX micro-drill at the mandibular edge in each rabbit. Nano-HA was implanted in defects of the experimental group, and common HA was used in the control group. Antibiotics were used for 5 days afterwards. MAIN OUTCOME MEASURES: Change in bone mineral density after implantation of nano-HA. RESULTS: After repair of bone defect, the bone mineral density in the expedmental group increased gradually to a normal level and tended to be stable; whereas it was gradually decreased in the control group. There was significant difference between the experimental and control groups (P < 0.01). CONCLUSION: Nano-HA can promote new bone maturation, and this material produces favorable results in repair of bone defects.

Objective To determine standard of Scutellaria baicalensis extract with fingerprint characteristic. Methods HPLC technique had been used to determine the content of eight flavones in S. baicalensis extract by HPLC. Results S. baicalensis extract had relative stability of fingerprint characteristic. The characterization method of fingerprint and analysis mothod were precise and rapid. Conclusion The standard of S. baicalensis extract with fingerprint characteristic has been obtained. It can be used to control the quality of S. baicalensis extract and it can support the component of Chinese materia medica.

Objective:To investigate the relationship of hypertension with osteoporosis(OP)and bone mineral density(BMD) in elderly type 2 diabetic women.Methods: A total of 179 elderly type 2 diabetic women were categorized into hypertension group(n=124)and non-hypertension group(n=55).Lumbar and hip BMD were measured by dual-energy X-ray absorptiometry.Prevalences of osteoporosis were compared between the two groups using Chi-square test,and BMD was compared using covariance analysis.The correlation between the osteoporosis and risk factors was analyzed using binary logistic regression method.Results: The prevalences of osteoporosis(total OP,lumber OP and hip OP) in non-hypertension group were higher than that of the hypertension group(Pt=0.037,Pl=0.042 and Ph=0.051,respectively).Lumbar and hip BMD in the hypertension group was higher than that in the non-hypertension group,and there were significant differences in L3 and L4 BMDs between the two groups(P3=0.040,P4=0.021);however,the difference disappeared after adjustment for body mass index(BMD).After adjustment for C peptide,the P value also increased,but not as obvious as after adjustment for BMI.Binary logistic regression analysis showed that OP was associated with age,BMI and osteocalcin,but not with hypertension.Conclusion: OP is associated with the age,BMI,and osteocalcin,but not with hypertension in elderly type 2 diabetic women.